<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <style type="text/css">
            .d1{
                width: 200px;
                height: 200px;
                margin: 30px 200px;
                transition: all 0.5s;
            }
            .d1:hover{
                box-shadow: 0px 5px 15px #999;
            }
        </style>
    </head>
    <body>
      
            <img src="小米.png"  class="d1">
       
    </body>
</html>